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Open-File Report 2013–1024-I

Prepared in cooperation with the U.S. Army, Fort Irwin National Training Center

Aeromagnetic Data, Processing, and Maps of Fort Irwin and Vicinity, California

By V.E. Langenheim and R.C. Jachens

Thumbnail of and link to report PDF (6.5 MB)Abstract

Aeromagnetic data help provide the underpinnings of a hydrogeologic framework for Fort Irwin by locating inferred structural features or grain that influence groundwater flow. Magnetization boundaries defined by horizontal-gradient analyses coincide locally with Cenozoic faults and can be used to extend these faults beneath cover. These boundaries also highlight the structural grain within the crystalline rocks and may serve as a proxy for fracturing, an important source of permeability within the generally impermeable basement rocks, thus mapping potential groundwater pathways through and along the mountain ranges in the study area.

First posted November 26, 2014

This report is only available on-line

Back to Geology and Geophysics Applied to Groundwater Hydrology at Fort Irwin, California

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http://geomaps.wr.usgs.gov/gmeg/

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Suggested citation:

Langenheim, V.E., and Jachens, R.C., 2014, Aeromagnetic data, processing, and maps of Fort Irwin and vicinity, California, chap. I of Buesch, D.C., ed., Geology and geophysics applied to groundwater hydrology at Fort Irwin, California: U.S. Geological Survey Open-File Report 2013–1024, 18 p. http://dx.doi.org/10.3133/ofr20131024I.

ISSN 2331-1258 (online)


Contents

Abstract

Introduction

Aeromagnetic Surveys

Aeromagnetic Map Processing and Anomaly Enhancement

Magnetic Susceptibility Measurements and Anomaly Sources

Magnetic Anomalies

Conclusions

Acknowledgments

References

Figures (8)

Tables (1)


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